Seiko Cal. 5643 - 838

Released in 1969, the Cal. 5643 with design code 838 was part of Seiko's domestic market collection. It features a Black dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-ea81ea0c9fbf]

Also known as: Shogun, Helmet

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1969

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